From the story here:
In the final days of the withdrawal, State rushed to notify Afghan allies who had worked with coalition forces that they had been approved for Special Application Visas (SIV) to resettle in the U.S. They sent the notice by email and directed SIV holders to present the document at the Kabul airport for entrance.
But the document that State forwarded had no name, serial number, or other identifying information, Aronson said. Afghans desperate to leave made thousands of copies of the notice, making it impossible to determine who had a legitimate visa and who had a forgery.
The emailed notice that had been “the sole mechanism” for confirming that an Afghan had SIV status and would therefore be allowed into the airport, he said, “became the least reliable mechanism to confirm somebody had an approved SIV.” Adding to the confusion, he told lawmakers the evacuation priority list changed “almost daily,” and that this information was seldom relayed in a timely fashion to the Marines guarding the airport gates.
